diff --git a/autoload/SpaceVim/api/transient_state.vim b/autoload/SpaceVim/api/transient_state.vim
index 699bbf796..48b794ca5 100644
--- a/autoload/SpaceVim/api/transient_state.vim
+++ b/autoload/SpaceVim/api/transient_state.vim
@@ -87,7 +87,7 @@ function! s:self.highlight_title() abort
 endfunction
 
 function! s:self._update_content() abort
-    if self._keys.layout == 'vertical split'
+    if get(self._keys, 'layout', '') == 'vertical split'
         let linenum = max([len(self._keys.right), len(self._keys.left)])
         for i in range(linenum)
             let left = get(self._keys.left, i)
diff --git a/autoload/SpaceVim/layers/default.vim b/autoload/SpaceVim/layers/default.vim
index 32a0769a3..5e5da556a 100644
--- a/autoload/SpaceVim/layers/default.vim
+++ b/autoload/SpaceVim/layers/default.vim
@@ -93,6 +93,9 @@ function! SpaceVim#layers#default#config() abort
                 \ . string(s:_function('s:jump_to_url')) . ', [])',
                 \ 'jump to url', 1)
     call SpaceVim#mapping#space#def('nnoremap', ['<Tab>'], 'try | b# | catch | endtry', 'last buffer', 1)
+    call SpaceVim#mapping#space#def('nnoremap', ['b', '.'], 'call call('
+                \ . string(s:_function('s:buffer_transient_state')) . ', [])',
+                \ 'buffer transient state', 1)
     call SpaceVim#mapping#space#def('nnoremap', ['b', 'd'], 'call SpaceVim#mapping#close_current_buffer()', 'kill-this-buffer', 1)
     call SpaceVim#mapping#space#def('nnoremap', ['b', 'D'],
                 \ 'call SpaceVim#mapping#kill_visible_buffer_choosewin()',
@@ -285,3 +288,10 @@ function! s:delete_current_buffer_file() abort
     redraw!
     
 endfunction
+
+function! s:buffer_transient_state() abort
+    let state = SpaceVim#api#import('transient_state') 
+    call state.set_title('Buffer Selection Transient State')
+    call state.defind_keys({})
+    call state.open()
+endfunction
diff --git a/docs/documentation.md b/docs/documentation.md
index 95eed0a94..d782e06da 100644
--- a/docs/documentation.md
+++ b/docs/documentation.md
@@ -759,6 +759,7 @@ Buffer manipulation commands (start with `b`):
 Key Binding | Description
 ----------- | -----------
 `SPC TAB` | switch to alternate buffer in the current window (switch back and forth)
+`SPC b .` | buffer transient state
 `SPC b b` | switch to a buffer (via denite/unite)
 `SPC b d` | kill the current buffer (does not delete the visited file)
 `SPC u SPC b d` | kill the current buffer and window (does not delete the visited file) (TODO)